The best way, IMO, is to talk to old Amiga users. Couple times a month, I'll be chatting in IRC on a non-Amiga related channel to find someone who use to own an Amiga. They are quiet suprised to find out about AROS even exists and even more suprised it runs on x86. If you can't code/documenation, or support
TeamAROS, you can still burn a couple of AROS CDs and hand them out. C= produced 7 million Amigas, there are quiet a few of those former Amgia owners who would love to know about AROS. Few of those maybe old coders.
Dammy